Re: Delete scheduler SD_WAKE_AFFINE and SD_WAKE_BALANCE flags

From: Ingo Molnar
Date: Fri Jul 29 2005 - 11:43:29 EST

* Nick Piggin <nickpiggin@xxxxxxxxxxxx> wrote:

> Chen, Kenneth W wrote:
> >Nick Piggin wrote on Thursday, July 28, 2005 7:01 PM
> >This clearly outlines an issue with the implementation. Optimize for one
> >type of workload has detrimental effect on another workload and vice versa.
> >
> Yep. That comes up fairly regularly when tuning the scheduler :(

in this particular case we can clearly separate the two workloads
though: CPU-overload (Ken's benchmark) vs. half-load (3-task tbench). So
by checking for migration target/source idleness we can have a hard
separator for wakeup balancing. (whether it works out for both types of
workloads remains to be seen)

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